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Lab 4.1 - ClusterIP and NodePort Services

Objectives​

By the end of this lab, you will be able to:

  • Create ClusterIP Services
  • Create NodePort Services
  • Verify Endpoints
  • Test connectivity

Exercise 1: ClusterIP Service​

Step 1: Create a Deployment​

apiVersion: apps/v1
kind: Deployment
metadata:
  name: web-deployment
spec:
  replicas: 3
  selector:
    matchLabels:
      app: web
  template:
    metadata:
      labels:
        app: web
    spec:
      containers:
      - name: nginx
        image: nginx:1.20

Step 2: Create a ClusterIP Service​

apiVersion: v1
kind: Service
metadata:
  name: web-service
spec:
  type: ClusterIP
  selector:
    app: web
  ports:
  - port: 80
    targetPort: 80

Step 3: Test​

# View the Service
kubectl get service web-service

# View the Endpoints
kubectl get endpoints web-service

# Test from a Pod
kubectl run test-pod --image=busybox --rm -it -- sh
# Inside the Pod: wget -O- http://web-service

Exercise 2: NodePort Service​

Step 1: Create a NodePort Service​

apiVersion: v1
kind: Service
metadata:
  name: web-nodeport
spec:
  type: NodePort
  selector:
    app: web
  ports:
  - port: 80
    targetPort: 80
    nodePort: 30080

Step 2: Test​

# View the Service
kubectl get service web-nodeport

# Access via NodePort
# curl http://<node-ip>:30080

Cleanup​

kubectl delete deployment web-deployment
kubectl delete service web-service web-nodeport

Next Steps​

Lab 4.2: Service Discovery with DNS

Lab created: December 2024